Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
prŏpĕrātim, adv. [properatus], hastily, quickly, speedily (ante-class.): properatim conficere opus, Caecil. ap. Non. 153, 15: pergis properatim, Pompon. ib. 155, 3; also Sisenn. acc. to Gell. 12, 15, 1.